Commit | Line | Data |
8d063cd8 |
1 | #!./perl |
2 | |
8990e307 |
3 | # "This IS structured code. It's just randomly structured." |
4 | |
971ecbe6 |
5 | BEGIN { |
6 | chdir 't' if -d 't'; |
7 | @INC = qw(. ../lib); |
7376f93f |
8 | require "test.pl"; |
971ecbe6 |
9 | } |
10 | |
7376f93f |
11 | use warnings; |
12 | use strict; |
4269b21d |
13 | plan tests => 54; |
ba9ff06f |
14 | |
7376f93f |
15 | our $foo; |
79072805 |
16 | while ($?) { |
8d063cd8 |
17 | $foo = 1; |
18 | label1: |
19 | $foo = 2; |
20 | goto label2; |
21 | } continue { |
22 | $foo = 0; |
23 | goto label4; |
24 | label3: |
25 | $foo = 4; |
26 | goto label4; |
27 | } |
28 | goto label1; |
29 | |
30 | $foo = 3; |
31 | |
32 | label2: |
7376f93f |
33 | is($foo, 2, 'escape while loop'); |
8d063cd8 |
34 | goto label3; |
35 | |
36 | label4: |
7376f93f |
37 | is($foo, 4, 'second escape while loop'); |
8d063cd8 |
38 | |
7376f93f |
39 | my $r = run_perl(prog => 'goto foo;', stderr => 1); |
40 | like($r, qr/label/, 'cant find label'); |
79072805 |
41 | |
7376f93f |
42 | my $ok = 0; |
79072805 |
43 | sub foo { |
44 | goto bar; |
79072805 |
45 | return; |
46 | bar: |
7376f93f |
47 | $ok = 1; |
79072805 |
48 | } |
49 | |
50 | &foo; |
7376f93f |
51 | ok($ok, 'goto in sub'); |
79072805 |
52 | |
53 | sub bar { |
7376f93f |
54 | my $x = 'bypass'; |
8990e307 |
55 | eval "goto $x"; |
79072805 |
56 | } |
57 | |
58 | &bar; |
59 | exit; |
8990e307 |
60 | |
61 | FINALE: |
7376f93f |
62 | is(curr_test(), 16, 'FINALE'); |
2c15bef3 |
63 | |
64 | # does goto LABEL handle block contexts correctly? |
ba9ff06f |
65 | # note that this scope-hopping differs from last & next, |
66 | # which always go up-scope strictly. |
7376f93f |
67 | my $count = 0; |
2c15bef3 |
68 | my $cond = 1; |
69 | for (1) { |
70 | if ($cond == 1) { |
71 | $cond = 0; |
72 | goto OTHER; |
73 | } |
74 | elsif ($cond == 0) { |
75 | OTHER: |
76 | $cond = 2; |
7376f93f |
77 | is($count, 0, 'OTHER'); |
78 | $count++; |
2c15bef3 |
79 | goto THIRD; |
80 | } |
81 | else { |
82 | THIRD: |
7376f93f |
83 | is($count, 1, 'THIRD'); |
84 | $count++; |
2c15bef3 |
85 | } |
86 | } |
7376f93f |
87 | is($count, 2, 'end of loop'); |
36c66720 |
88 | |
89 | # Does goto work correctly within a for(;;) loop? |
90 | # (BUG ID 20010309.004) |
91 | |
92 | for(my $i=0;!$i++;) { |
93 | my $x=1; |
94 | goto label; |
7376f93f |
95 | label: is($x, 1, 'goto inside a for(;;) loop body from inside the body'); |
36c66720 |
96 | } |
97 | |
98 | # Does goto work correctly going *to* a for(;;) loop? |
99 | # (make sure it doesn't skip the initializer) |
100 | |
101 | my ($z, $y) = (0); |
7376f93f |
102 | FORL1: for ($y=1; $z;) { |
103 | ok($y, 'goto a for(;;) loop, from outside (does initializer)'); |
104 | goto TEST19} |
105 | ($y,$z) = (0, 1); |
36c66720 |
106 | goto FORL1; |
107 | |
108 | # Even from within the loop? |
36c66720 |
109 | TEST19: $z = 0; |
7376f93f |
110 | FORL2: for($y=1; 1;) { |
36c66720 |
111 | if ($z) { |
7376f93f |
112 | ok($y, 'goto a for(;;) loop, from inside (does initializer)'); |
36c66720 |
113 | last; |
114 | } |
7376f93f |
115 | ($y, $z) = (0, 1); |
36c66720 |
116 | goto FORL2; |
117 | } |
118 | |
9c5794fe |
119 | # Does goto work correctly within a try block? |
7376f93f |
120 | # (BUG ID 20000313.004) - [perl #2359] |
121 | $ok = 0; |
9c5794fe |
122 | eval { |
123 | my $variable = 1; |
124 | goto LABEL20; |
125 | LABEL20: $ok = 1 if $variable; |
126 | }; |
7376f93f |
127 | ok($ok, 'works correctly within a try block'); |
128 | is($@, "", '...and $@ not set'); |
9c5794fe |
129 | |
130 | # And within an eval-string? |
9c5794fe |
131 | $ok = 0; |
132 | eval q{ |
133 | my $variable = 1; |
134 | goto LABEL21; |
135 | LABEL21: $ok = 1 if $variable; |
136 | }; |
7376f93f |
137 | ok($ok, 'works correctly within an eval string'); |
138 | is($@, "", '...and $@ still not set'); |
9c5794fe |
139 | |
140 | |
a4f3a277 |
141 | # Test that goto works in nested eval-string |
142 | $ok = 0; |
143 | {eval q{ |
144 | eval q{ |
145 | goto LABEL22; |
146 | }; |
147 | $ok = 0; |
148 | last; |
149 | |
150 | LABEL22: $ok = 1; |
151 | }; |
152 | $ok = 0 if $@; |
153 | } |
7376f93f |
154 | ok($ok, 'works correctly in a nested eval string'); |
a4f3a277 |
155 | |
33d34e4c |
156 | { |
157 | my $false = 0; |
7376f93f |
158 | my $count; |
33d34e4c |
159 | |
160 | $ok = 0; |
161 | { goto A; A: $ok = 1 } continue { } |
7376f93f |
162 | ok($ok, '#20357 goto inside /{ } continue { }/ loop'); |
33d34e4c |
163 | |
164 | $ok = 0; |
165 | { do { goto A; A: $ok = 1 } while $false } |
7376f93f |
166 | ok($ok, '#20154 goto inside /do { } while ()/ loop'); |
33d34e4c |
167 | $ok = 0; |
168 | foreach(1) { goto A; A: $ok = 1 } continue { }; |
7376f93f |
169 | ok($ok, 'goto inside /foreach () { } continue { }/ loop'); |
33d34e4c |
170 | |
171 | $ok = 0; |
172 | sub a { |
173 | A: { if ($false) { redo A; B: $ok = 1; redo A; } } |
7376f93f |
174 | goto B unless $count++; |
33d34e4c |
175 | } |
176 | a(); |
7376f93f |
177 | ok($ok, '#19061 loop label wiped away by goto'); |
33d34e4c |
178 | |
179 | $ok = 0; |
7376f93f |
180 | my $p; |
33d34e4c |
181 | for ($p=1;$p && goto A;$p=0) { A: $ok = 1 } |
7376f93f |
182 | ok($ok, 'weird case of goto and for(;;) loop'); |
33d34e4c |
183 | } |
184 | |
5023d17a |
185 | # bug #9990 - don't prematurely free the CV we're &going to. |
186 | |
187 | sub f1 { |
188 | my $x; |
4269b21d |
189 | goto sub { $x=0; ok(1,"don't prematurely free CV\n") } |
5023d17a |
190 | } |
191 | f1(); |
192 | |
241416b8 |
193 | # bug #22181 - this used to coredump or make $x undefined, due to |
194 | # erroneous popping of the inner BLOCK context |
195 | |
7376f93f |
196 | undef $ok; |
197 | for ($count=0; $count<2; $count++) { |
241416b8 |
198 | my $x = 1; |
199 | goto LABEL29; |
200 | LABEL29: |
7376f93f |
201 | $ok = $x; |
241416b8 |
202 | } |
7376f93f |
203 | is($ok, 1, 'goto in for(;;) with continuation'); |
241416b8 |
204 | |
971ecbe6 |
205 | # bug #22299 - goto in require doesn't find label |
206 | |
207 | open my $f, ">goto01.pm" or die; |
208 | print $f <<'EOT'; |
209 | package goto01; |
210 | goto YYY; |
211 | die; |
212 | YYY: print "OK\n"; |
213 | 1; |
214 | EOT |
215 | close $f; |
216 | |
7376f93f |
217 | $r = runperl(prog => 'use goto01; print qq[DONE\n]'); |
971ecbe6 |
218 | is($r, "OK\nDONE\n", "goto within use-d file"); |
219 | unlink "goto01.pm"; |
220 | |
e3aba57a |
221 | # test for [perl #24108] |
7376f93f |
222 | $ok = 1; |
223 | $count = 0; |
e3aba57a |
224 | sub i_return_a_label { |
7376f93f |
225 | $count++; |
e3aba57a |
226 | return "returned_label"; |
227 | } |
228 | eval { goto +i_return_a_label; }; |
7376f93f |
229 | $ok = 0; |
230 | |
231 | returned_label: |
232 | is($count, 1, 'called i_return_a_label'); |
233 | ok($ok, 'skipped to returned_label'); |
971ecbe6 |
234 | |
ff0adf16 |
235 | # [perl #29708] - goto &foo could leave foo() at depth two with |
236 | # @_ == PL_sv_undef, causing a coredump |
237 | |
238 | |
7376f93f |
239 | $r = runperl( |
ff0adf16 |
240 | prog => |
241 | 'sub f { return if $d; $d=1; my $a=sub {goto &f}; &$a; f() } f(); print qq(ok\n)', |
242 | stderr => 1 |
243 | ); |
7376f93f |
244 | is($r, "ok\n", 'avoid pad without an @_'); |
ff0adf16 |
245 | |
ba9ff06f |
246 | goto moretests; |
7376f93f |
247 | fail('goto moretests'); |
8990e307 |
248 | exit; |
249 | |
250 | bypass: |
7376f93f |
251 | |
252 | is(curr_test(), 5, 'eval "goto $x"'); |
8990e307 |
253 | |
254 | # Test autoloading mechanism. |
255 | |
256 | sub two { |
7376f93f |
257 | my ($pack, $file, $line) = caller; # Should indicate original call stats. |
258 | is("@_ $pack $file $line", "1 2 3 main $::FILE $::LINE", |
259 | 'autoloading mechanism.'); |
8990e307 |
260 | } |
261 | |
262 | sub one { |
263 | eval <<'END'; |
7376f93f |
264 | no warnings 'redefine'; |
265 | sub one { pass('sub one'); goto &two; fail('sub one tail'); } |
8990e307 |
266 | END |
267 | goto &one; |
268 | } |
269 | |
7376f93f |
270 | $::FILE = __FILE__; |
271 | $::LINE = __LINE__ + 1; |
8990e307 |
272 | &one(1,2,3); |
273 | |
7376f93f |
274 | { |
275 | my $wherever = 'NOWHERE'; |
276 | eval { goto $wherever }; |
277 | like($@, qr/Can't find label NOWHERE/, 'goto NOWHERE sets $@'); |
278 | } |
8990e307 |
279 | |
62b1ebc2 |
280 | # see if a modified @_ propagates |
281 | { |
7376f93f |
282 | my $i; |
62b1ebc2 |
283 | package Foo; |
7376f93f |
284 | sub DESTROY { my $s = shift; ::is($s->[0], $i, "destroy $i"); } |
285 | sub show { ::is(+@_, 5, "show $i",); } |
62b1ebc2 |
286 | sub start { push @_, 1, "foo", {}; goto &show; } |
7376f93f |
287 | for (1..3) { $i = $_; start(bless([$_]), 'bar'); } |
62b1ebc2 |
288 | } |
289 | |
379c5dcc |
290 | sub auto { |
291 | goto &loadit; |
292 | } |
293 | |
7376f93f |
294 | sub AUTOLOAD { $ok = 1 if "@_" eq "foo" } |
379c5dcc |
295 | |
7376f93f |
296 | $ok = 0; |
297 | auto("foo"); |
298 | ok($ok, 'autoload'); |
379c5dcc |
299 | |
7376f93f |
300 | { |
301 | my $wherever = 'FINALE'; |
302 | goto $wherever; |
303 | } |
304 | fail('goto $wherever'); |
ba9ff06f |
305 | |
306 | moretests: |
307 | # test goto duplicated labels. |
308 | { |
309 | my $z = 0; |
ba9ff06f |
310 | eval { |
311 | $z = 0; |
312 | for (0..1) { |
313 | L4: # not outer scope |
314 | $z += 10; |
315 | last; |
316 | } |
317 | goto L4 if $z == 10; |
318 | last; |
319 | }; |
7376f93f |
320 | like($@, qr/Can't "goto" into the middle of a foreach loop/, |
321 | 'catch goto middle of foreach'); |
ba9ff06f |
322 | |
323 | $z = 0; |
324 | # ambiguous label resolution (outer scope means endless loop!) |
ba9ff06f |
325 | L1: |
326 | for my $x (0..1) { |
327 | $z += 10; |
7376f93f |
328 | is($z, 10, 'prefer same scope (loop body) to outer scope (loop entry)'); |
ba9ff06f |
329 | goto L1 unless $x; |
330 | $z += 10; |
331 | L1: |
7376f93f |
332 | is($z, 10, 'prefer same scope: second'); |
ba9ff06f |
333 | last; |
334 | } |
335 | |
ba9ff06f |
336 | $z = 0; |
337 | L2: |
338 | { |
339 | $z += 10; |
7376f93f |
340 | is($z, 10, 'prefer this scope (block body) to outer scope (block entry)'); |
ba9ff06f |
341 | goto L2 if $z == 10; |
342 | $z += 10; |
343 | L2: |
7376f93f |
344 | is($z, 10, 'prefer this scope: second'); |
ba9ff06f |
345 | } |
346 | |
347 | |
348 | { |
ba9ff06f |
349 | $z = 0; |
350 | while (1) { |
351 | L3: # not inner scope |
352 | $z += 10; |
353 | last; |
354 | } |
7376f93f |
355 | is($z, 10, 'prefer this scope to inner scope'); |
ba9ff06f |
356 | goto L3 if $z == 10; |
357 | $z += 10; |
358 | L3: # this scope ! |
7376f93f |
359 | is($z, 10, 'prefer this scope to inner scope: second'); |
ba9ff06f |
360 | } |
361 | |
362 | L4: # not outer scope |
363 | { |
ba9ff06f |
364 | $z = 0; |
365 | while (1) { |
366 | L4: # not inner scope |
367 | $z += 1; |
368 | last; |
369 | } |
7376f93f |
370 | is($z, 1, 'prefer this scope to inner,outer scopes'); |
ba9ff06f |
371 | goto L4 if $z == 1; |
372 | $z += 10; |
373 | L4: # this scope ! |
7376f93f |
374 | is($z, 1, 'prefer this scope to inner,outer scopes: second'); |
ba9ff06f |
375 | } |
376 | |
377 | { |
7376f93f |
378 | my $loop = 0; |
379 | for my $x (0..1) { |
ba9ff06f |
380 | L2: # without this, fails 1 (middle) out of 3 iterations |
381 | $z = 0; |
382 | L2: |
383 | $z += 10; |
7376f93f |
384 | is($z, 10, |
385 | "same label, multiple times in same scope (choose 1st) $loop"); |
ba9ff06f |
386 | goto L2 if $z == 10 and not $loop++; |
387 | } |
388 | } |
389 | } |
390 | |
a45cdc79 |
391 | # deep recursion with gotos eventually caused a stack reallocation |
392 | # which messed up buggy internals that didn't expect the stack to move |
393 | |
394 | sub recurse1 { |
395 | unshift @_, "x"; |
7376f93f |
396 | no warnings 'recursion'; |
a45cdc79 |
397 | goto &recurse2; |
398 | } |
399 | sub recurse2 { |
7376f93f |
400 | my $x = shift; |
a45cdc79 |
401 | $_[0] ? +1 + recurse1($_[0] - 1) : 0 |
402 | } |
7376f93f |
403 | is(recurse1(500), 500, 'recursive goto &foo'); |
a45cdc79 |
404 | |
b1464ded |
405 | # [perl #32039] Chained goto &sub drops data too early. |
406 | |
407 | sub a32039 { @_=("foo"); goto &b32039; } |
408 | sub b32039 { goto &c32039; } |
7376f93f |
409 | sub c32039 { is($_[0], 'foo', 'chained &goto') } |
b1464ded |
410 | a32039(); |
411 | |
3a1b2b9e |
412 | # [perl #35214] next and redo re-entered the loop with the wrong cop, |
413 | # causing a subsequent goto to crash |
414 | |
415 | { |
416 | my $r = runperl( |
417 | stderr => 1, |
418 | prog => |
419 | 'for ($_=0;$_<3;$_++){A: if($_==1){next} if($_==2){$_++;goto A}}print qq(ok)' |
420 | ); |
7376f93f |
421 | is($r, "ok", 'next and goto'); |
3a1b2b9e |
422 | |
423 | $r = runperl( |
424 | stderr => 1, |
425 | prog => |
426 | 'for ($_=0;$_<3;$_++){A: if($_==1){$_++;redo} if($_==2){$_++;goto A}}print qq(ok)' |
427 | ); |
7376f93f |
428 | is($r, "ok", 'redo and goto'); |
3a1b2b9e |
429 | } |
b1464ded |
430 | |
a45cdc79 |
431 | |